Stable Audio Open
Open-weight text-to-audio — 47-second sound effects and music.
Open Source 6–8 GB VRAM
- Min VRAM
- 6 GB
- GPU class
- Entry GPU
- Quant
- FP16
Actually FreeOpen SourceWatermark-FreeHobbyist-Friendly
MMAudio
Generate synchronized audio for any silent video.
Open Source 8–12 GB VRAMRuns locally
Actually FreeNo SignupOpen SourceWatermark-FreeHobbyist-Friendly
Visit MMAudioUpdated 2026-04-10 · Direct link
Hardware requirements
Runs locally · Entry GPU (6–8 GB)
Min VRAM
8 GB
Rec. VRAM
12 GB
Min RAM
16 GB
Rec. RAM
16 GB
Disk
8 GB
GPU class
Entry GPU
11.8+Apple Silicon ✓GPU RequiredQuant: FP16
Small/medium variants on 8 GB; large on 12 GB.
Screenshot placeholder · MMAudio
What is MMAudio?
MMAudio (Sony AI + research collab) generates synchronized sound effects and ambient audio for silent video clips. Drop in a Wan/Hunyuan/SVD output and get matching footsteps, ambient room tone, splashes — automatically aligned to the frame. Best-in-class for the V2A (video-to-audio) niche.
Pros & cons
Pros
- Solves the silent-video-output problem of every OSS video model
- Frame-synced output, not just ambient overlay
- Conditioning on a text prompt for fine control
- Lightweight — runs on 8 GB VRAM
Cons
- Niche tool — only useful as a post-processor for silent video
- Speech generation is intentionally out of scope
What's actually free?
MIT-licensed; full weights public.
✓ Actually FreeNo SignupOpen SourceWatermark-Free
Alternatives
AudioCraft (MusicGen)
Meta's text-to-music & sound-effect model family.
Open Source 8–16 GB VRAM
- Min VRAM
- 8 GB
- GPU class
- Entry GPU
- Quant
- FP16
Actually FreeNo SignupOpen SourceWatermark-Free